METHOD AND APPARATUS FOR CONTROLLING THE RECOVERY OF SOLID POLYOLEFIN FROM A CONTINUOUS REACTION ZONE

A polymerisation process and a loop reactor comprising polymerising olefins in a liquid diluent to produce a liquid slurry containing particles of normally solid polymer within the loop reactor, allowing the polymer to settle in a settling leg, periodically opening a 180 DEG rotating product take-of...

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1. Verfasser: MARK VERLEYSEN
Format: Patent
Sprache:eng ; por
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Zusammenfassung:A polymerisation process and a loop reactor comprising polymerising olefins in a liquid diluent to produce a liquid slurry containing particles of normally solid polymer within the loop reactor, allowing the polymer to settle in a settling leg, periodically opening a 180 DEG rotating product take-off valve located at the end of the settling leg to allow a charge of particles to flow out of the settling leg, the product take-off valve being operated by a pneumatically driven double-acting actuator, the pneumatic system being regulated by a system comprising pneumatic control valves, the improvement which consists in using automatic control valves, which are automatic V-ball valves.